In this article, I deal in general lines with the role oh human eye in the development of optical theories in the period from ancient Greek to the end of sixteenth century. Two great moments of the history of optics are set for: Antiquity and the thirteenth century. I try to rise some of the main points related to the importance of human eye in the act of vision, relating these points to three research traditions which served as a base to the elaboration of optical theories, the first philosophical, the second anatomical, and the third matematical. The intention is to map the situation of optics as the function of the human eye before Kepler's revolutionary works at the beginning of seventeenth century.
Optics; Vision; Camera obscura; Anatomy; Perspective; Euclides; Alhazen; Kepler
